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Chapter 15 Key Terms
Bio 311D - Zhao
12
Biology
Undergraduate 3
09/25/2011

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Term
Carriers
Definition
an individual who is heterozygous with one normal allele and one recessive allele
Term
Sex-linkage
Definition
a gene located on a sex chromosome (most likely X) resulting in a distinct pattern of inheritance
Term
Linked genes
Definition
genes located close enough together on a chromosome that they tend to be inherited together
Term
Hemophilia
Definition
A genetic disease caused by a sex-linked recessive allele resulting in the lost of one or more blood clotting proteins
Term
Aneuploidy
Definition
a condition where you are missing or have a few extra chromosomes
Term
Barr body
Definition
an inactiv X chromosome
Term
Trisomy
Definition
a condition where an organism has 3 copies of a chromosome instead of the usual 2
Term
Polyploidy
Definition
A condition where an organism has more than 2 sets of chromosomes
Term
Down syndrome
Definition
A genetic disease caused by the presence of an extra chromosome 21
Term
Klinfelter syndrome
Definition
a condition where a male child has an extra X chromosome
Term
Turner syndrome
Definition
a condition where a female child is missing an X chromosome
Term
Speck syndrome
Definition
a condition where a male child has an extra Y chromosome
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